isearch-no-upper-case-p

isearch-no-upper-case-p is a compiled Lisp function in `isearch.el'.

(isearch-no-upper-case-p STRING REGEXP-FLAG)

Return t if there are no upper case chars in STRING.
If REGEXP-FLAG is non-nil, disregard letters preceded by `\' (but not `\\')
since they have special meaning in a regexp.